Mukan Erkin Törük
6852832fe8
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67 lines
2.1 KiB
Go
67 lines
2.1 KiB
Go
package blsverifier
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/*
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* This custom query handler is used to aggregate public keys and verify a signature using BLS.
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* It is used by the 08-wasm union light client, which we we use in the solidity IBC v2 e2e tests.
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* The code here is taken from here: https://github.com/unionlabs/union/tree/main/uniond/app/custom_query
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*/
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import (
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"encoding/json"
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"fmt"
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sdk "github.com/cosmos/cosmos-sdk/types"
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)
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const (
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MessageSize = 32
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)
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type CustomQuery struct {
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AggregateVerify *QueryAggregateVerify `json:"aggregate_verify,omitempty"`
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Aggregate *QueryAggregate `json:"aggregate,omitempty"`
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}
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type QueryAggregate struct {
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PublicKeys [][]byte `json:"public_keys"`
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}
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type QueryAggregateVerify struct {
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PublicKeys [][]byte `json:"public_keys"`
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Signature []byte `json:"signature"`
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Message []byte `json:"message"`
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}
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func CustomQuerier() func(sdk.Context, json.RawMessage) ([]byte, error) {
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return func(ctx sdk.Context, request json.RawMessage) ([]byte, error) {
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var customQuery CustomQuery
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err := json.Unmarshal([]byte(request), &customQuery)
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if err != nil {
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return nil, fmt.Errorf("failed to parse custom query %v", err)
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}
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switch {
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case customQuery.Aggregate != nil:
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aggregatedPublicKeys, err := AggregatePublicKeys(customQuery.Aggregate.PublicKeys)
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if err != nil {
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return nil, fmt.Errorf("failed to aggregate public keys %v", err)
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}
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return json.Marshal(aggregatedPublicKeys.Marshal())
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case customQuery.AggregateVerify != nil:
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if len(customQuery.AggregateVerify.Message) != MessageSize {
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return nil, fmt.Errorf("invalid message length (%d), must be a %d bytes hash: %x", len(customQuery.AggregateVerify.Message), MessageSize, customQuery.AggregateVerify.Message)
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}
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msg := [MessageSize]byte{}
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for i := range MessageSize {
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msg[i] = customQuery.AggregateVerify.Message[i]
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}
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result, err := VerifySignature(customQuery.AggregateVerify.Signature, msg, customQuery.AggregateVerify.PublicKeys)
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if err != nil {
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return nil, fmt.Errorf("failed to verify signature %v", err)
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}
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return json.Marshal(result)
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default:
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return nil, fmt.Errorf("unknown custom query %v", request)
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}
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}
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}
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